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US 7,257,255 B2Granted
Capturing hand motion
AssigneeCandleDragon, Inc.
InventorArkady Pittel
Life of this patent
Estimating the term…
Abstract
A portable electronic device, a digital camera associated with the portable electronic device, and software configured to run on the portable electronic device and to derive handwriting and control information from hand motion of a writing instrument in the vicinity of the digital camera.
Claims26
Apparatus comprising
- a portable electronic device comprising
- a digital camera, and
- a processor configured to derive handwriting or control information based on hand motion of a writing instrument from infared light received by the digital camera directly from the writing instrument when the writing instrument is used on a writing surface, the writing instrument and writing surface being separate from the apparatus.
A method comprising
- in a portable electronic device comprising a digital camera and a processor,
- receiving images at the digital camera comprising infared light received directly from a writing instrument being used on a writing surface, the writing instrument and writing surface being separate from the device, and
- deriving handwriting and control information based on hand motion of the writing instrument, from the images.
Apparatus comprising
- a portable electronic device comprising
- a digital camera, and
- a processor configured to
- derive handwriting or control information based on hand motion of a writing instrument from light received by the digital camera directly from the writing instrument when the writing instrument is used on a writing surface, the writing instrument and the writing surface being separate from the apparatus, and
- define a mapping between a sensor surface in the digital camera and a in response to calibration steps that include a user marking three locations on the writing surface.
2 more elements
Dependencies are inferred from the claim text.